JP2679837B2 - Biodegradable composite material - Google Patents
Biodegradable composite materialInfo
- Publication number
- JP2679837B2 JP2679837B2 JP1041518A JP4151889A JP2679837B2 JP 2679837 B2 JP2679837 B2 JP 2679837B2 JP 1041518 A JP1041518 A JP 1041518A JP 4151889 A JP4151889 A JP 4151889A JP 2679837 B2 JP2679837 B2 JP 2679837B2
- Authority
- JP
- Japan
- Prior art keywords
- composite material
- biodegradable composite
- aqueous emulsion
- copolymer
- acid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は生分解性複合材料に関し、特にポリヒドロキ
シ酪酸・ポリヒドロキシ吉草酸共重合体を主成分とする
水系エマルジョンを用いたものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a biodegradable composite material, and particularly to an aqueous emulsion containing a polyhydroxybutyric acid / polyhydroxyvaleric acid copolymer as a main component.
［従来の技術と課題］ 従来、食品等の各種包装フィルム、農業分野で使用さ
れているマルチフィルムなどには、ポリ塩化ビニル，ポ
リエチレン，ポリプロピレン，ポリエステルなどの各種
プラスチックが適用されている。しかし、これらのもの
はいずれも土中に埋めても生分解されず、その廃棄処理
に著しい困難が生じている。[Prior Art and Problems] Conventionally, various plastics such as polyvinyl chloride, polyethylene, polypropylene, and polyester have been applied to various packaging films for foods and mulch films used in the agricultural field. However, none of these materials are biodegradable even when buried in the soil, and their disposal is extremely difficult.
また、植物性繊維を主原料とする織布や紙等の基材は
土中等にて生分解されるが、耐水性，耐溶剤性，気密性
等により使用が大きく制約される。従って、これらの基
材を用いる場合には、一般にポリエチレンなどのプラス
チックをコーティング又はラミネートした状態で使用さ
れるが、この場合プラスチックが非分解性の為、やはり
廃棄処理に問題が残る。In addition, base materials such as woven fabrics and papers, which are mainly composed of vegetable fibers, are biodegradable in soil, but their use is greatly restricted due to water resistance, solvent resistance, airtightness and the like. Therefore, when these base materials are used, they are generally used in the state of coating or laminating a plastic such as polyethylene. In this case, however, since the plastic is non-degradable, there is still a problem in disposal.
しかるに、上記したプラスチックがそのまま廃棄され
ると、ゴミ処理場の確保，汚染等の観点から環境上我々
の生活に悪影響を及ぼすことになる。また、仮にこうし
たプラスチックを焼却炉等で処分するにしても大量の燃
料を費やすとともに、人体に有毒なガスを周囲に巻き散
らすことになり、好ましくない。However, if the above plastics are discarded as they are, it will have an adverse effect on our lives in terms of the environment from the viewpoints of securing a garbage disposal site, pollution, etc. Further, even if such a plastic is disposed of in an incinerator or the like, a large amount of fuel is consumed and a gas toxic to the human body is scattered around, which is not preferable.
本発明は上記事情に鑑みてなされたもので、ポリヒド
ロキシ酪酸・ポリヒドロキシ吉草酸共重合体を主成分と
する水系エマルジョンを、植物性繊維を主原料とする基
材へコーティングすることにより、耐水性，耐溶剤性，
気密性等の物性に優れ、かつ土中等での生分解性に優れ
た生分解性複合材料を提供することを目的とする。The present invention has been made in view of the above circumstances, by coating a water-based emulsion containing a polyhydroxybutyric acid / polyhydroxyvaleric acid copolymer as a main component on a base material whose main raw material is vegetable fiber, Resistance, solvent resistance,
An object of the present invention is to provide a biodegradable composite material which has excellent physical properties such as airtightness and biodegradability in soil or the like.
［課題を解決するための手段］ 本発明者等は、織布，紙等の基材の「生分解性を有す
る」という長所を生かしつつ、この基材の短所である耐
水性，耐溶剤性，気密性等の物性をポリヒドロキシ酪酸
・ポリヒドロキシ吉草酸共重合体を適宜用いることによ
って補い、その結果として耐水性，耐溶剤性，気密性等
の物性に優れ、かつ土中等での生分解性に優れた生分解
性複合材料を得るに至った。[Means for Solving the Problems] The present inventors have taken advantage of the “biodegradability” of base materials such as woven fabric and paper, and at the same time, have the disadvantages of water resistance and solvent resistance. , Physical properties such as airtightness are supplemented by using polyhydroxybutyric acid / polyhydroxyvaleric acid copolymer as appropriate, resulting in excellent physical properties such as water resistance, solvent resistance, airtightness and biodegradation in soil. A biodegradable composite material having excellent properties has been obtained.
本発明は、ポリヒドロキシ酪酸・ポリヒドロキシ吉草
酸共重合体を主成分とする水系エマルジョンを、植物性
繊維を主原料とする基材へコーティングしたことを特徴
とする生分解性複合材料である。The present invention is a biodegradable composite material characterized by coating an aqueous emulsion containing a polyhydroxybutyric acid / polyhydroxyvaleric acid copolymer as a main component on a substrate containing vegetable fiber as a main raw material.
本発明に係るポリヒドロキシ酪酸・ポリヒドロキシ吉
草酸共重合体（以下、単に共重合体と称する）は下記構
造式（１）で示され、優れた微生物高分子材料である。
ここに、上記共重合体はクロロホルムなどの塩素系有機
溶剤に溶解するが、この溶媒は毒性があるため環境面へ
の配慮が必要であり、取扱い上問題がある。また、前記
共重合体の結合はランダムでもブロックでもよい。The polyhydroxybutyric acid / polyhydroxyvaleric acid copolymer (hereinafter, simply referred to as a copolymer) according to the present invention is represented by the following structural formula (1) and is an excellent microbial polymer material.
Here, the above-mentioned copolymer is dissolved in a chlorine-based organic solvent such as chloroform, but since this solvent is toxic, it is necessary to give consideration to the environment and there is a problem in handling. The bonds of the copolymer may be random or block.
上記共重合体は、カルボン酸塩系の任意の分散剤を水
系エマルジョンに混合することにより分散性を向上でき
る。また、上記共重合体のほかに、デンプン，セルロー
ス，キチン等の天然高分子、及びその誘導体、ポリビニ
ルアルコール，ポリ乳酸等の合成高分子類から選ばれた
一種類もしくは二種類以上の物質を水系エマルジョンに
加え、複合化することにより、土中における生分解の速
度を調製することができる。 The dispersibility of the above copolymer can be improved by mixing any of the carboxylate-based dispersants with the aqueous emulsion. In addition to the above copolymers, one or more substances selected from natural polymers such as starch, cellulose and chitin, and derivatives thereof, synthetic polymers such as polyvinyl alcohol and polylactic acid are used as an aqueous system. The rate of biodegradation in soil can be adjusted by complexing in addition to the emulsion.
本発明に係る水系エマルジョンは、前記共重合体20〜
60重量％、水65〜30重量％、デンプンなどの第３成分５
〜30重量％の割合で混合し、撹拌することにより分散調
製できる。ここで、前記共重合体及び水を上記の如く限
定するのは、共重合体が少なく水が多い場合は、水系エ
マルジョンをコーティングしても被膜が形成しずらく、
また共重合体が多く水が少ない場合は、水系エマルジョ
ンをコーティングすると被膜が厚くなりすぎクラックが
入り易いなど、均一な塗工を行なうことが困難である。
更に、第３成分を上記の如く限定するのは、少ない場合
は上記の効果が得られにくく、多い場合は均一な塗工を
行なうことが困難であるからである。The aqueous emulsion according to the present invention, the copolymer 20 ~
60% by weight, 65-30% by weight of water, third component 5 such as starch 5
A dispersion can be prepared by mixing at a ratio of up to 30% by weight and stirring. Here, the above-mentioned copolymer and water are limited as described above, because when the amount of the copolymer is small and the amount of water is large, it is difficult to form a film even when the aqueous emulsion is coated,
Further, when the amount of the copolymer is large and the amount of water is small, coating with an aqueous emulsion causes the coating to become too thick and cracks easily occur, which makes it difficult to perform uniform coating.
Further, the reason why the third component is limited as described above is that it is difficult to obtain the above effect when the amount is small, and it is difficult to apply a uniform coating when the amount is large.
［作用］ 本発明によれば、微生物高分子材料であるポリヒドロ
キシ酪酸・ポリヒドロキシ吉草酸からなる共重合体を主
成分とする水系エマルジョンを植物性繊維を主原料とす
る基材へコーティングすることにより、耐水性，耐溶剤
性，気密性等の物性に優れ、かつ土中等での生分解性に
優れた生分解性複合材料を得ることができる。[Action] According to the present invention, a water-based emulsion containing a copolymer of polyhydroxybutyric acid / polyhydroxyvaleric acid, which is a microbial polymer material, as a main component is coated on a substrate containing vegetable fiber as a main raw material. Thus, a biodegradable composite material having excellent physical properties such as water resistance, solvent resistance, airtightness, and excellent biodegradability in soil can be obtained.
［実施例］ 以下、本発明の一実施例について製造方法を併記して
説明する。[Example] Hereinafter, an example of the present invention will be described together with a manufacturing method.
まず、ポリヒドロキシ酪酸88％，ポリヒドロキシ吉草
酸12％からなる共重合体を十分に乾燥させる。次に、こ
の共重合体37.4部、水52.5部、15％濃度のポリビニルア
ルコール溶液10部を、ポリカルボン酸塩系の分散剤0.1
部をとともに撹拌装置にて室温で５時間撹拌し、水系エ
マルジョンを調製した。次に、この水系エマルジョンを
ロールコーター法にて厚さ0.1mmのクラフト紙にコーテ
ィングした後、65℃,80℃,120℃の３段階に加熱して生
分解性複合材料を得た。First, a copolymer consisting of 88% polyhydroxybutyric acid and 12% polyhydroxyvaleric acid is thoroughly dried. Next, 37.4 parts of this copolymer, 52.5 parts of water, 10 parts of a 15% concentration polyvinyl alcohol solution, a polycarboxylic acid salt-based dispersant 0.1
The parts were stirred together at room temperature for 5 hours with a stirrer to prepare an aqueous emulsion. Next, a 0.1 mm thick kraft paper was coated with this aqueous emulsion by a roll coater method, and then heated in three stages of 65 ° C., 80 ° C. and 120 ° C. to obtain a biodegradable composite material.
このようにして得られた生分解性複合材料は、ポリヒ
ドロキシ酪酸88％，ポリヒドロキシ吉草酸12％からなる
微生物高分子材料である共重合体を主成分とする水系エ
マルジョンを、クラフト紙にコーティングした構成とな
っているため、耐水性，耐溶剤性，気密性等の物性に優
れ、かつ土中等での生分解性に優れた生分解性複合材料
を得ることができる。The biodegradable composite material obtained in this way was coated on kraft paper with an aqueous emulsion containing a copolymer, which is a microbial polymer composed of 88% polyhydroxybutyric acid and 12% polyhydroxyvaleric acid, as the main component. With such a structure, it is possible to obtain a biodegradable composite material having excellent physical properties such as water resistance, solvent resistance, and airtightness, and excellent biodegradability in soil or the like.
事実、上記複合材料を100mm×100mmの大きさに切断
し、長崎県北松郡世知原町の畑土に埋め、その複合材料
の重量及び強度の経時的変化を測定したところ、下記第
１表に示す結果を得た。In fact, the above composite material was cut into a size of 100 mm × 100 mm, buried in upland soil of Sachihara Town, Kitamatsu District, Nagasaki Prefecture, and the changes over time in the weight and strength of the composite material were measured. The results are shown in Table 1 below. I got the result.
上記第１表により、本発明に係る生分解性複合材料に
よれば、重量等が徐徐に減少し、良好な生分解性特性を
示すことが確認できる。 From Table 1 above, it can be confirmed that the biodegradable composite material according to the present invention gradually reduces the weight and the like and exhibits favorable biodegradable properties.
［発明の効果］ 以上詳述した如く本発明によれば、ポリヒドロキシ酪
酸・ポリヒドロキシ吉草酸共重合体を主成分とする水系
エマルジョンを、植物性繊維を主原料とする基材へコー
ティングすることにより、耐水性，耐溶剤性，気密性等
の物性に優れ、かつ土中等での生分解性に優れ、もって
都市ゴミや下水処理場の余剰汚泥などの処理法として知
られている好気条件下での急速堆肥化処理でも処理可能
な生分解性複合材料を提供できる。[Effects of the Invention] As described in detail above, according to the present invention, a water-based emulsion containing a polyhydroxybutyric acid / polyhydroxyvaleric acid copolymer as a main component is coated on a substrate containing vegetable fiber as a main raw material. Has excellent physical properties such as water resistance, solvent resistance, and airtightness, and is excellent in biodegradability in soil, etc., and is known as an aerobic condition known as a method for treating municipal waste and surplus sludge from sewage treatment plants. It is possible to provide a biodegradable composite material that can be treated even by rapid composting treatment below.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ０８Ｌ 5/08 Ｃ０８Ｌ 5/08 67/00 67/00 (72)発明者 池内 愛治 東京都港区虎ノ門２丁目９番14号 中興 化成工業株式会社内 (56)参考文献 特開 昭61−43119（ＪＰ，Ａ)─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification number Reference number within the agency FI technical display location C08L 5/08 C08L 5/08 67/00 67/00 (72) Inventor Aiji Ikeuchi Tokyo Metropolitan Port 2-9-14 Toranomon-ku, Chuko Kasei Kogyo Co., Ltd. (56) Reference JP-A-61-43119 (JP, A)
Claims (3)
酸共重合体を主成分とする水系エマルジョンを、植物性
繊維を主原料とする基材へコーティングしたことを特徴
とする生分解性複合材料。1. A biodegradable composite material, characterized in that an aqueous emulsion containing a polyhydroxybutyric acid / polyhydroxyvaleric acid copolymer as a main component is coated on a substrate containing vegetable fiber as a main raw material.
分散剤が混合されている請求項１記載の生分解性複合材
料。2. The biodegradable composite material according to claim 1, wherein a carboxylate-based dispersant is mixed with the aqueous emulsion.
分子、及びその誘導体、ポリビニルアルコール，ポリ乳
酸等の合成高分子類から選ばれた一種類もしくは二種類
以上の物質が水系エマルジョンに混合されている請求項
１記載の生分解性複合材料。3. One or more substances selected from natural polymers such as starch, cellulose and chitin, and their derivatives, synthetic polymers such as polyvinyl alcohol and polylactic acid are mixed in an aqueous emulsion. The biodegradable composite material according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1041518A JP2679837B2 (en) | 1989-02-23 | 1989-02-23 | Biodegradable composite material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1041518A JP2679837B2 (en) | 1989-02-23 | 1989-02-23 | Biodegradable composite material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02222421A JPH02222421A (en) | 1990-09-05 |
| JP2679837B2 true JP2679837B2 (en) | 1997-11-19 |
Family
ID=12610597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1041518A Expired - Fee Related JP2679837B2 (en) | 1989-02-23 | 1989-02-23 | Biodegradable composite material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2679837B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102283056A (en) * | 2010-06-18 | 2011-12-21 | 福建中烟工业公司 | Method for manufacturing paper making-process multifunction organic environmental-protection flaky mulching film |
Families Citing this family (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATA258390A (en) * | 1990-12-19 | 1997-08-15 | Danubia Petrochem Polymere | MIXTURE PRESENTLY FROM A POLYHYDROXYALKANOATE AND A COMPOUND THAT CONTAINS AT LEAST TWO REACTIVE GROUPS LIKE ACID AND / OR ALCOHOL GROUPS AND A POLYMERIZED PRODUCTION BY MELTING THE MIXTURE |
| AU658180B2 (en) * | 1991-05-03 | 1995-04-06 | Novamont S.P.A. | Biodegradable polymeric compositions based on starch and thermoplastic polymers |
| JP2513091B2 (en) * | 1991-05-10 | 1996-07-03 | 株式会社島津製作所 | Biodegradable composite material and manufacturing method thereof |
| SG52351A1 (en) * | 1991-06-26 | 1998-09-28 | Procter & Gamble | Biodegradable liquid impervious films |
| CA2111241C (en) * | 1991-06-26 | 1997-07-01 | Douglas Toms | Disposable absorbent articles with biodegradable backsheets |
| EP0533314A3 (en) * | 1991-09-17 | 1993-06-30 | Novacor Chemicals (International) S.A. | Biodegradable polyester compositions |
| JPH064100U (en) * | 1992-06-08 | 1994-01-18 | 勝造商事株式会社 | Synthetic resin |
| US5939467A (en) * | 1992-06-26 | 1999-08-17 | The Procter & Gamble Company | Biodegradable polymeric compositions and products thereof |
| FR2693734B1 (en) * | 1992-07-15 | 1994-10-07 | Roquette Freres | Thermoformable-biodegradable composition based on a starchy compound and a biodegradable polyester. |
| FR2709500B1 (en) * | 1993-08-02 | 1996-02-16 | Fiberweb Sodoca Sarl | Nonwoven based on polymers derived from lactic acid, process for manufacturing and using such a nonwoven. |
| US5686066A (en) * | 1995-10-05 | 1997-11-11 | Mitsui Toatsu Chemicals, Inc. | Polyaspartic acid Zwitterionic derivatives, preparation processes thereof, hair-treating compositions and cosmetic compositions |
| CN1084761C (en) * | 1998-09-23 | 2002-05-15 | 湖北省轻工业科学研究设计院 | Farm plant fiber mulch and producing method therefor |
| JP2003096281A (en) * | 2001-09-26 | 2003-04-03 | Mitsui Chemicals Inc | Aqueous dispersing element, fine particle and coating film of biodegradable polyester, and production method thereof |
| WO2003099539A1 (en) * | 2002-05-24 | 2003-12-04 | Nexsol Technologies, Inc. | Biodegradable compound and preparation method thereof, and molded material made of the same and molding method thereof |
| JP2004018744A (en) * | 2002-06-18 | 2004-01-22 | Mitsui Chemicals Inc | Aqueous polylactic acid resin dispersion |
| FR2843523B1 (en) | 2002-08-13 | 2005-03-04 | Ahlstrom Research & Services | BIODEGRADABLE FIBROUS SUPPORT FOR SOIL FLOORING |
| FR2843525B1 (en) | 2002-08-13 | 2004-09-10 | Ahlstrom Research & Services | BIODEGRADABLE FIBROUS SUPPORT FOR FLOORING |
| DE60334183D1 (en) * | 2002-09-18 | 2010-10-28 | Toray Industries | Fiberboard and process for its production |
| US7172814B2 (en) * | 2003-06-03 | 2007-02-06 | Bio-Tec Biologische Naturverpackungen Gmbh & Co | Fibrous sheets coated or impregnated with biodegradable polymers or polymers blends |
| ES2886103T3 (en) * | 2016-12-20 | 2021-12-16 | Michelman Inc | Coated substrates, including compostable coatings and production methods thereof |
| CN111484711B (en) * | 2019-01-29 | 2022-04-26 | 合肥杰事杰新材料股份有限公司 | Degradable medical material and preparation method thereof |
-
1989
- 1989-02-23 JP JP1041518A patent/JP2679837B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102283056A (en) * | 2010-06-18 | 2011-12-21 | 福建中烟工业公司 | Method for manufacturing paper making-process multifunction organic environmental-protection flaky mulching film |
| CN102283056B (en) * | 2010-06-18 | 2013-09-04 | 福建中烟工业有限责任公司 | Method for manufacturing paper making-process multifunction organic environmental-protection flaky mulching film |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02222421A (en) | 1990-09-05 |
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